Method of precipitating artificial threads, ribbons, films, and the like from viscose



- pletely from the colloidal, solution that the l atented july 7 1925UNITED STATES PATENT OFFICE.

ADOLF KAMPF, OE PREMNITZ, WESTHAV ELLAND, GERMANY.

FILMS, AND THE LIKE FROM VISCOSE.

No Drawing.

To aZZ whom it may cancer-'7:

Be it known that I, AnoLrH KAMPF, a citizen of the Republic of Germany,and residing at Premnitz, Westhavelland, Germany, have invented certainnew and useful Improvements in Methods of Precipitating ArtificialThreads, Ribbons, -Films, and the like from Viscose, for which I filedan application in Germany June 8,1921, and of which the following is aspecification.

The present invention relates to methods of spinning artificial threads,and the like, from viscose.

every viscose expert knows, from experience and from literature, a goodprecipitating bath for viscose must comply with the followingrequisites.

On the one hand, the viscose must not be decomposed too directly, as thereformed cellulose or hydratecellulose would then be exposed to toostrong chemical action and the reformed oil would then have time to sethard, thick lumps. On the other hand, the precipitating bath must reformthe cellulose or hydrate cellulose so comcellulose parts contained inthe viscose which oifer the greatest resistance are entirely convertedfrom the state of a motherwater into an oil, so that by proper Washes,which attack the cellulose itself as little as possible, theprecipitated hydrate cellulose is obtained as non-adhering thread, whichis as solid as possible.

It has been found that the requisites for a precipitating bath are to agreat extent complied with by using sulphonic acids of the products ofcondensation (and, if necessary, mixed with such of their salts as aresoluble in water) obtainable by sulphonating the condensation productsof phenols with aldehydes, ketones. and other substances havingmolecular bodies of al dehydic and. ketonic character, especiallyketoses, aldoses and the various hydro-car'- bons from which such highermolecular bodies can be made. These substances all have the aldehydereaction.

It has been found that these bodies, which heretofore have enjoyed acertain amount of popularity as artificial tanning materials, are alsovery useful for spinning-bath purposes. In .certain cases they may bemixed with given quantities of pure mineral acids and salts of suchmineral acids, or salts of vlulose.

- threads, films,

Application filed July 25, 1922. Serial No. 577,428.

the sulphonic'acids themselves. Using such baths, in particular, it ispossible to spin not only viscoses of various degrees of ripeness, butalso entirely unripened viscose, .that is, fresh viscose from unripenedalkalicel- The artificial threads that are spun With the aid of baths ofthis character fulfill every requisite demanded of them in,

their structure and, accordingly, in their other properties also, suchas stability and .lustre. I ribbons, films Example.

A spinning bath consisting of 10% sul phurie acid, 8% neradol, 10%sodium sulphateand 72% water, is used for making the finest viscosethreads out of unripened viscose. The temperature of the bath is about18 and the length of theprecipitating bath about 40 ems, with normaldrawing-oif speed. The threads show, when used as artificial silk, highlustre and solidity.

afving now more fully described and ascertained the nature of myinvention and in what manner the same is to be performed, I declare thatWhat I claim is:

1. A method of spinning artificial ribbons and the like of viscoseoomprismg squirting viscose into an aqueous solution of a sulphonic acidof a condensation product.

2. A method of spinning c artificial threads, films, ribbons and thelike of viscose comprising squirting viscose into an aqueous solution ofa sulphonic acid of a condensation phonating" the condensation productof phenol with aldehyde.

3. A method of spinning artificial'threads,

films, ribbons and the like of viscose comprising squirting the viscoseinto an aqueous solution of a sulphonic acid of a condensation productobtained by sulphonating the condensation product of phenol with asubstance having an aldehyde reaction.

4. A method of spinning artificial threads, films, ribbons and the likeof viscose comprising squirting viscose into an aqueous solution of asulphonic acid of acondensation product obtained by s'ulphonating thecondensation product of phenol with a substance having a molecular bodyof aldehydic character.

5. A method ofsp-inningartificial threads, films, ribbons and the likeof viscose comproduct", obtained by sul-.

prising squirting viscose into an. aqueous solution of a sulphonic acidof a condensation product obtainedby .sulphonating the condensationproduct of phenol with a high molecular hydro-carbon forming a compoundof aldehydic character.

6. A method of spinning artificial threads, films, ribbons and the likeof viscose comprising squirting viscose into an aqueous solution of asulphonic acid of a condensation product obtained by sulphonating thecondensation product of phenol with a high molecular hydro-carbonforming a coin pound of character having an aldehyde re action.

i 7. A methodof spinning artificial threads, films, ribbons and the likeof viscose comprising squirting viscose into an aqueous- .solution ofsulphonic acids of condensation products obtained by sulphonating thecondensation products of phenols with alde hydes, ketones, aldoses,ketoses and higher molecular hydrocarbons forming these bodies. I h

8. 'A methodcof spinning artificial threads,

? ';films, ribbons and the like of viscose comprising squirting viscose,into an aqueous solution of a sulphonic acid of a condensation product,the said aqueous solution containing one or more mineral acids. 9. Amethod of spinning artificial threads films, ribbons and the like ofviscose comprising squirting viscose into an aqueous solution of asulphonic acid-of a condensation product, the said. aqueous solutioncontaining one or more salts of phonic acid.

10. A method of threads, films, ribbons an 'thelike of viscosecomprising squirting viscose into an aqueous solution of a sulphonicacid of a condensation product, the said aqueous solution contining oneor more mineral acids and one or more salts of the said mineral acids. I

11. A method of spinning artificial threads, films, ribbons and the likeof viscose comprising squirting'unripened viscose into an aqueoussolution of a sulphonic acid of a condensation product, the said aqueoussolution containing one or more miheral acids. DR. ADOLF KAMPF-Witnesses:

E.'.HoLDzoRUM, R. T. AUTGAER.

the said suls inning artificial

